The northern pitcher plant (Sarracenia purpurea) – left – and sundew (Drosera sp.) – much smaller, far right – are the two types of carnivorous plants at the Harvard Pond/Tom Swamp research tracts of the Harvard Forest.﻿ Photo by Roxanne Ardeshiri﻿.

Ben Baiser and Harvard Forest Summer Research Program student Roxanne Ardeshiri head out to Harvard Pond in Petersham, Mass., to study pitcher plants. Photo by Aleta Wiley.

Ben Baiser extracts the invertebrates from a pitcher plant for later analysis. Photo by Roxanne Ardeshiri.